COS(3) OpenBSD Programmer's Manual COS(3)NAME
cos, cosf, cosl - cosine functions
SYNOPSIS
#include <math.h>
double
cos(double x);
float
cosf(float x);
long double
cosl(long double x);
DESCRIPTION
The cos() function computes the cosine of x (measured in radians). The
cosf() function is a single precision version of cos(). The cosl()
function is an extended precision version of cos(). A large magnitude
argument may yield a result with little or no significance. For a
discussion of error due to roundoff, see math(3).
RETURN VALUES
The cos(), cosf() and cosl() functions return the cosine value.
SEE ALSOacos(3), asin(3), atan(3), atan2(3), cosh(3), math(3), sin(3), sinh(3),
tan(3), tanh(3)STANDARDS
The cos() function conforms to ANSI X3.159-1989 (``ANSI C'').
OpenBSD 4.9 December 12, 2008 OpenBSD 4.9